@article{DBLP:journals/jcss/EhrigM81,
  author    = {Hartmut Ehrig and
               Bernd Mahr},
  title     = {Complexity of Algebraic Implementations for Abstract Data
               Types},
  journal   = {J. Comput. Syst. Sci.},
  volume    = {23},
  number    = {2},
  year      = {1981},
  pages     = {223-253},
  ee        = {http://dx.doi.org/10.1016/0022-0000(81)90014-3},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}